{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "sangnt (@gnas0x0018) with Viettel Cyber Security"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-50521 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50521"
      },
      {
        "category": "self",
        "summary": "CVE-2026-50521 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-50521.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2026-06-26T07:00:00.000Z",
      "generator": {
        "date": "2026-06-27T00:56:35.130Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-50521",
      "initial_release_date": "2026-06-09T07:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-26T07:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c149.0.4022.68",
            "product": {
              "name": "Microsoft Edge (Chromium-based) \u003c149.0.4022.68",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "149.0.4022.68",
            "product": {
              "name": "Microsoft Edge (Chromium-based) 149.0.4022.68",
              "product_id": "11655"
            }
          }
        ],
        "category": "product_name",
        "name": "Microsoft Edge (Chromium-based)"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-50521",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "Yes. Customers should apply all updates offered for the software installed on their systems.",
          "title": "There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Security Updates table for the software?"
        },
        {
          "category": "faq",
          "text": "An attacker who successfully exploited this vulnerability could view sensitive information such as other user\u0027s credentials (Confidentiality) and make changes to file contents on the target server (Integrity), and they might be able to force a crash within the server (Availability).",
          "title": "According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H), and integrity (I:H), and some loss of availability (A:L). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.",
          "title": "According to the CVSS metric, privileges required is low (PR:L).  What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "An attacker could attempt to trick a user into interacting with a malicious request that appears legitimate. When the user approves the request, the attacker could cause the app to obtain an access token on the user\u2019s behalf and send it to a location controlled by the attacker, without the user being clearly informed about what access is being granted.",
          "title": "How could an attacker exploit this vulnerability?"
        },
        {
          "category": "faq",
          "text": "149.0.4022.68: 149.0.4022.68, 06/14/2026: 06/14/2026, 149.0.7827.103: 149.0.7827.103",
          "title": "What is the version information for this release?"
        },
        {
          "category": "faq",
          "text": "149.0.4022.67: 149.0.4022.67, 06/15/2026: 06/15/2026, 149.0.7827.103: 149.0.7827.103",
          "title": "What is the version information for this release?"
        }
      ],
      "product_status": {
        "fixed": [
          "11655"
        ],
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-50521 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50521"
        },
        {
          "category": "self",
          "summary": "CVE-2026-50521 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-50521.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-26T07:00:00.000Z",
          "details": "149.0.4022.68:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security",
          "product_ids": [
            "1"
          ],
          "url": "https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security"
        },
        {
          "category": "vendor_fix",
          "date": "2026-06-26T07:00:00.000Z",
          "details": "149.0.4022.67:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security",
          "product_ids": [
            "1"
          ],
          "url": "https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 7.2,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability"
    }
  ]
}